|Publication number||US5326283 A|
|Application number||US 08/101,563|
|Publication date||Jul 5, 1994|
|Filing date||Aug 3, 1993|
|Priority date||Aug 3, 1993|
|Publication number||08101563, 101563, US 5326283 A, US 5326283A, US-A-5326283, US5326283 A, US5326283A|
|Original Assignee||E Lead Electronic Co., Ltd.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (43), Classifications (9), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to an improved electrical plug for automobile use, and more particularly to a plug equipped with more than one power supply outlet.
In general, the conventional electrical plug adapted for automobile use has only one power supply cord with one minor socket attached thereto. The plug is plugged into a major socket disposed on the panel of an automobile mainly used as a cigarette lighting means.
With the fast development of electric accessories widely applied to an automobile, such as action telephones, electric chargers, vedio cameras and radar detectors and objects of the like , the single major socket is not quite enough to meet the requirement any more. So, there is one specially designed type of plug available in the market, as shown in FIG. 1. This plug 11 is provided with a pair of extension cords 14, 15 to which are attached respectively a cigarette lighting means 12 and a power outlet 13. Although, this kind of plug offers an extra power supply cord, there are still some disadvantages associated therewith that are given as below:
1. The extension cords can not be received when not used, or adjusted in length for different purpose.
2. The pending cigarette lighting means can cause the loosening of the inserted plug, resulting in poor electrical conduction.
The primary object of the present invention is to provide an improved electric plug for automobile use which is comprised of a plug body having a side outlet at the periphery thereof so as to permit an extension cord extends therefrom; and a socket is disposed at the rear end thereof so as to permit another plug to be attached thereto.
Another object of the present invention is to provide an improved electric plug for automobile use which has a cord fixing hookdisposes at the periphery of the top end thereof whereby the extension cord can be adjustably wound around the plug and retained partially by the cord fixing unit.
FIG. 1 is a diagram showing a prior art plug for automobile use;
FIG. 2 is a diagram showing the structure of the present invention;
FIG. 3 is a sectional diagram showing the inner structure of the plug of the present invention;
FIG. 4 is a diagram showing the extension cord being wound and retained in place by a fixing unit;
FIG. 5 is a diagram showing two plugs of the present invention being associated with each other end to end.
Referring to FIGS. 2, 3, the present invention is comprised of a plug body 2 having a contact protrusion 3, a fuse 5 and a spring 6, the front end of the plug body 2 having outer threads 21, and a cap 4 removably secured to the front end. The contact protrusion 3, the fuse 5 and the spring 6 are consecutively housed inside the plug body 2 with the spring 6 in abutment against the conducting plate B of the base seat 23. The contact protrusion 3 abuts against the negative (positive ) pole of the power source of an automobile when plugged, forming a positive or negative circuitry.
Near the front end of the plug body 2 is provided with a pair of slot-like openings 26 so that a pair of flexible conducting strips 7 each having an arc protrusion 71 can stick out of the openings 26 and abut against the positive (negative) pole of the power source. The ends of the conducting strips 7 are coupled to a conducting plate A disposed on the wall of the end of the plug body 2 so as to form a negative or positive circuitry.
An extension cord 8 having its positive wire 81 and a negative wire 82 connected to the conducting plate B and to one of the flexible conducting strip 7 respectively is led through a side hole 22 disposed on the periphery of the plug body 2, forming another power supply circuit.
Referring further to FIG. 4, the extension cord 8 can be adjustably varied with the whole length thereof or excessive portion thereof winding around the plug body 2 and the cord 8 can be retained in place by a cord fixing hook 25 disposed on the periphery of the top end of the plug body 2.
Referring to FIG. 5, the end of the plug body 2 has a socket 24, as shown in FIG. 3, engaged with the socket 24 is a plug of an electrical device or is another plug body 2 to which can be consecutively connected a number of plug body 2 so as to flexibly provide more power supply cords.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US4109988 *||Jul 15, 1977||Aug 29, 1978||Olson Ernest E||Duplex outlet device|
|US4248494 *||Jan 31, 1979||Feb 3, 1981||Mcdonald Edward S||Automobile dashboard power adapter|
|US5131869 *||Sep 24, 1990||Jul 21, 1992||Safco Corporation||Electrical adapter plug|
|US5201677 *||Jul 2, 1992||Apr 13, 1993||Shinwa Electric Co., Ltd.||Car plug|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5431585 *||May 12, 1994||Jul 11, 1995||Fan; Eagle||Car circuit adapter|
|US5564943 *||May 26, 1995||Oct 15, 1996||Weiss; Alan||Electric socket convertor|
|US5593323 *||Jan 13, 1995||Jan 14, 1997||Operating Technical Electronics, Inc.||Reversible polarity accessory cable|
|US5620336 *||Nov 14, 1995||Apr 15, 1997||Black & Decker Inc.||Cable retainer for electric cable|
|US5690509 *||Feb 26, 1996||Nov 25, 1997||United Industrial Trading Corp.||Lighted accessory power supply cord|
|US5714805 *||Feb 28, 1996||Feb 3, 1998||Brian J. Lobaugh||Vehicle accessory power take-off system including phono/RCA type plug and jack for use with cigarette lighter plug/jack|
|US5775952 *||Jul 16, 1997||Jul 7, 1998||Lu; Wen-San||Plug for automobile cigarette lighter socket|
|US5782646 *||Jun 12, 1997||Jul 21, 1998||Nokia Mobile Phones Limited||Combined connector contact|
|US5884008 *||Dec 8, 1997||Mar 16, 1999||Goldberg; Sherry P||Portable hair dryer for use in a vehicle with handle switch responsive to pivoting and vehicle battery voltage indicator|
|US5964616 *||Nov 21, 1997||Oct 12, 1999||United Industrial Trading Corp.||Lighted accessory power supply cord|
|US6064177 *||Jan 5, 1999||May 16, 2000||Dixon; Steven C.||Two-part battery charger/power cable article with multiple device capability|
|US6140905 *||Jun 23, 1999||Oct 31, 2000||Toyo System Co., Ltd.||Electrically conductive contact pin having a temperature fuse function|
|US6428348 *||Oct 27, 2000||Aug 6, 2002||Hewlett-Packard Company||Power supply adapter for portable electronic devices|
|US6589069 *||Apr 22, 2002||Jul 8, 2003||Sheng Hsin Liao||Wire reel having a universal serial bus connector capable of doing emergency charging work|
|US6600826 *||Jul 6, 2001||Jul 29, 2003||Elius A. Xavier||Modularly expandible, multi-user audio headphone|
|US6693413||May 7, 2002||Feb 17, 2004||Comarco Wireless Technologies, Inc.||Programmable power supply|
|US6707284||Oct 21, 2002||Mar 16, 2004||Comarco Wireless Technologies, Inc.||Programmable power supply|
|US6746272 *||Apr 1, 2002||Jun 8, 2004||Hewlett-Packard Development Company, L.P.||Power supply adapter for portable electronic devices|
|US6809943||Dec 5, 2002||Oct 26, 2004||Comarco Wireless Technologies, Inc.||Programmable power supply|
|US6831848||Dec 6, 2002||Dec 14, 2004||Comarco Wireless Technologies, Inc.||Programmable power supply to simultaneously power a plurality of electronic devices|
|US6922347||Aug 26, 2004||Jul 26, 2005||Comarco Wireless Technologies, Inc.||Programmable power supply|
|US7234975 *||Jul 5, 2006||Jun 26, 2007||Kabushiki Kaisha Tokai Rika Denki Seisakusho||Vehicle power supply outlet|
|US7450390||Jul 5, 2006||Nov 11, 2008||Comarco Wireless Technologies, Inc.||Programmable power supply|
|US7450403||Aug 9, 2007||Nov 11, 2008||Comarco Wireless Technologies, Inc.||Switching power supply utilizing switch-selectable resistors to determine output voltage|
|US7460381||Apr 12, 2006||Dec 2, 2008||Comarco Wireless Technologies, Inc.||Programmable power supply|
|US7495941||Aug 9, 2007||Feb 24, 2009||Comarco Wireless Technologies, Inc.||Power supply equipment with matching indicators on converter and connector adapters|
|US7613021||Nov 3, 2009||Comarco Wireless Technologies, Inc||Small form factor power supply|
|US7626356||Jan 5, 2007||Dec 1, 2009||Belkin International, Inc.||Modular power supply comprising an AC module, DC module and an electric charge storage module|
|US7649279||Jul 12, 2006||Jan 19, 2010||Comarco Wireless Technologies, Inc||Power supply for simultaneously providing operating voltages to a plurality of devices|
|US7863770||Nov 25, 2009||Jan 4, 2011||Comarco Wireless Technologies, Inc.||Power supply equipment for simultaneously providing operating voltages to a plurality of devices|
|US8213204||Jul 3, 2012||Comarco Wireless Technologies, Inc.||Modular power adapter|
|US8354760||Oct 28, 2009||Jan 15, 2013||Comarco Wireless Technologies, Inc.||Power supply equipment to simultaneously power multiple electronic device|
|US20030132668 *||Dec 6, 2002||Jul 17, 2003||Comarco Wireless Technologies, Inc.||Programmable power supply to simultaneously power a plurality of electronic devices|
|US20050024907 *||Aug 26, 2004||Feb 3, 2005||Comarco Wireless Technologies, Inc.||Programmable power supply|
|US20060227580 *||Jun 7, 2006||Oct 12, 2006||Comarco Wireless Technologies Inc.||Programmable power supply|
|US20070010136 *||Jul 5, 2006||Jan 11, 2007||Kenichi Abe||Vehicle power supply outlet|
|US20070279952 *||Aug 9, 2007||Dec 6, 2007||Comarco Wireless Technologies, Inc.||Switching power supply utilizing switch-selectable resistors to determine output voltage|
|US20080151581 *||Feb 29, 2008||Jun 26, 2008||Comarco Wireless Technologies, Inc.||Small form factor power supply|
|US20100109436 *||Nov 25, 2009||May 6, 2010||Comarco Wireless Technologies, Inc.||Power supply equipment for simultaneously providing operating voltages to a plurality of devices|
|US20100254162 *||Apr 1, 2009||Oct 7, 2010||Comarco Wireless Technologies, Inc.||Modular power adapter|
|US20140342600 *||Jul 30, 2013||Nov 20, 2014||Premier Accessory Group LLC||Automotive adapter with cord retainer|
|EP0920089A2 *||Nov 27, 1998||Jun 2, 1999||Kiok Kee Seah||A plug|
|WO1997032365A1 *||Feb 28, 1997||Sep 4, 1997||Tomahawk Industries, Inc.||Vehicle accessory power using phono-type plug|
|U.S. Classification||439/620.34, 439/638, 439/501|
|International Classification||H01R31/02, B60N3/14|
|Cooperative Classification||H01R31/02, B60N3/14|
|European Classification||H01R31/02, B60N3/14|
|Sep 15, 1993||AS||Assignment|
Owner name: E LEAD ELECTRONIC CO., LTD., TAIWAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHEN, TONNY;REEL/FRAME:006698/0151
Effective date: 19930723
|Jul 5, 1998||LAPS||Lapse for failure to pay maintenance fees|
|Sep 15, 1998||FP||Expired due to failure to pay maintenance fee|
Effective date: 19980708